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Published online by Cambridge University Press: 31 May 2012
The common blue mud-dauber of the United States and Canada is generally known as either Chalybion caeruleum Linnaeus or Chalybion cyaneum Fabricius (or Klug or Dahlbom). Both names are incorrect. This wasp was first described as Sphex caerulea by Johansson or Linnaeus in 1763 (Amoenitates Academicae, VI, p. 412).
* Ent. News, XV, pp. 177–120, (1904). V. et. Ann. Ent. Soc. Amer., XXIV, pp. 439–440;450, 1931).
† Hutson, J. C. The North American species of the genus Sceliphron. Trans. Amer. Ent. Soc., XLV, pp. 203–227, (1919).